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3 years ago

How many solutions does this equation have? 7a + 5 (a+3) = 8a + 4 (a+2)

Mathematics

1 answer:

Vlada [557]3 years ago

5 0

Answer:

no solution.

Step-by-step explanation: type it into the calculator on symbolab. it will tell you how to solve and give you the answer.

brainliest?

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Graph the solution of this inequality:<br> 4x -10 ><br> – 12

navik [9.2K]

Answer:

well on what type of graph

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3 years ago

In 20P4 how many choices are

marta [7]

<h3>Answer: B) 19</h3>

Explanation:

There are 20 choices for president, and 20-1 = 19 choices for vice president. You count down by 1 each time you fill a seat. So that means you'll have 19-1 = 18 choices for the third seat, and 18-1 = 17 choices for the fourth seat.

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3 years ago

The following random sample was selected from a normal distribution: 4.5, 6.4, 2.3, 1.8, 5.3, then the 95% confidence interval t

kap26 [50]

Answer:

the 95% confidence interval to estimate the population mean is between 1.62 and 6.50

Step-by-step explanation:

given data

distribution = 4.5, 6.4, 2.3, 1.8, 5.3

so n = 5

confidence interval = 95%

to find out

the population mean is between

solution

first we calculate the mean i.e.

mean = $\frac{1}{n}\sum_{i=1}^{n}x(i)$

mean = 4.5+ 6.4+ 2.3+ 1.8+ 5.3 / 5

mean = 4.06

now we calculate the standard deviation i.e.

standard deviation = $\sqrt{\frac{1}{n-1}\sum (x(i)-mean)^2}$

standard deviation = $\sqrt{\frac{1}{5-1}\sum (x(i)-mean)^2}$

standard deviation = $\sqrt{\frac{1}{5-1} (4.5-5)^2+(6.4-5)^2 +(2.3-5)^2+(1.8-5)^2+(5.3-5)^2}$

standard deviation = $\sqrt{\frac{1}{4} (4.5-5)^2+(6.4-5)^2 +(2.3-5)^2+(1.8-5)^2+(5.3-5)^2}$

standard deviation = 2.226544

so 95 % confidence interval is i.e. mean +/- t(5) * standard deviation/ $\sqrt{n}$

here t(5) will be 2.45

95 % confidence interval= 4.06 +/- 2.45 * 2.226 / $\sqrt{5}$

95 % confidence interval= 1.62 and 6.50

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3 years ago

Pls do this 4 me<br> thx

Butoxors [25]

Answer:

Step-by-step explanation:

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3 years ago

Jasmine decided to go hot air ballooning for her fourteen birthday. She launches 6ft above ground and then ascends 12 ft further

Alexxandr [17]

Answer:

-2 ft

Step-by-step explanation:

So first we do 6 + 12, which is 18, then we do 20 - 18 which is -2. If you dont have an answer like -2 then pick 2 if its a selection.

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3 years ago

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